Thermo Scientific 75003603, Инструкция по эксплуатации

Страница: 28 / 46

5
Aerosol-tight Applications
Basic Principles
5-2
75003603 BIOShield
TM
1000A Thermo Scientific
Basic Principles
• Check that the sample containers are well suited for the desired centrifugation process.
Placing O-ring
The o-ring fulfills its purpose best, when it is neither stressed nor bulked. Meaning the o-ring should
be equally placed in the groove of the lid.
Place the o-ring as follows:
1. Place the o-ring above the groove.
2. Push the o-ring on two opposite places into the groove. Make sure the rest of the o-ring is equally
distributed.
3. Push the centers of the loose parts into the groove.
4. Push the remaining o-ring into place.
Fill Level
The tubes are only to be filled to a level which ensures that the sample is unable to reach the top of
the tube during centrifugation. Therefore fill the tube only 2/3 of the rated level.
Checking the Aerosol-Tightness
The aerosol tightness testing of the rotors and buckets depend on the microbiological test process in
accordance with the EN 61010-2-020 Appendix AA.
Whether a rotor is aerosol-tight or not depends primarily on proper handling.
Make sure your rotor is aerosol-tight.
The careful inspection of the seals and seal surfaces for signs of wear and damage such as cracks,
scratches and embrittlement is extremely important.
Aerosol-tight applications are not possible if the lids are open.
CAUTION
When centrifuging hazardous samples, do not open aerosol-tight rotors or
buckets unless placed in a safety cabinet.
Always bear in mind the maximum permitted fill levels.
Be sure to check all seals before starting any aerosol-tight applications.
Note
If the o-ring seems to be too long or too short, take it off the lid and repeat the process.
Aerosol-tightness requires the correct operation when filling the sample vessels and closing the rotor lid.